Production of camphor



WALTER I. SCHEELE, OF

SZECHI, OF NEW YORK, N. Y.

PRODUCTION or uni/xenon.

1% Drawing. Original application filer November 24, 1520, Serial No. 426,131. Divided and this application filed March 30, 1921.

To (ZZZ err/m it may {1077,66'77L.

Be it known that Elfin-man T. SCHEELE, a citizen of Germany, residing at Hacker sack. in the county of Bergen and State of 5 New Jersey. has invented certain new and useful Improvements in the Production of Cztmphor, of which the following is a specification, This application is a divisional applie 0 tion from-my United States patent applica on. Ederilzl hlo. iiffidi-li, filed November 2on1. i920.

The pr sent. invention relates to the production Oi camphor from cnmphoric acid 1-5 and has for object to provide an improved proces. wherehy such conversion may be effected by a direct process and more expeditiously and cheaply the heretofore. l have found that the reduction or" cum 1) him .c acid to caniplior can be readily ellected lay the action of readily oxidizehle metals n ely divided form. ln order that oilses2 listener-s the cumphor is dissolved o suitable solvent and finely divided metal mixed with the solution. The size of the. illc particles depends on the nature of The hest form of metal is that toe metal is ohtnined in extremely vi ed condition. The metal thus ohd in extremely finely divided Form gives sntisioctory results in the present t e solution heated to 50 F. .ed iron is added and the whole intact may he obtained hetwcen the re The finely divided material sold Serial No. 457,035.

maintained at 50 C. for about 15 to minutcs or longer. The solution is then filtered from residual iron and the cumphor is precipitated by -admixture with water col lected, melted and cast into suitable form.

The reduction of camphorie acid may also be effected in similar manner by use of powdered tin, copper or aluminum or other 1cz1d ily oxidizable metals.

1. The method of reducing camphoric acid to cumphor which consists of treating. the camphoric acid with a finely divided readily oxidizah-le metal.

2. The method of reducing camphorio acid to camphor which consists of treatinga solution of camphoric acid with a finely divided readily oxidizahle metal.

The method of reducing camphoric acid to cumnhor which consists of treating" a solution of camphoric acid in alcohol with a finely divided readily oxidizahlc metal.

l. The method of reducing cnmphoric acid to cumphor which consists oi treating camphoric acid with finely divided iron.

The method of reducing camphoric acid to camphor which consists of treating camphoric acid with ferrum hydrogenio re ductum.

6. The method of reducing cmnphoric acid to camphor which consists of treating a solution oi camphoric acid with finely divided iron.

WALTER T. SC HEELE. 

